EP1488770A1 - Stand-up chair with self-modifying tilting of the backrest - Google Patents

Stand-up chair with self-modifying tilting of the backrest Download PDF

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Publication number
EP1488770A1
EP1488770A1 EP04356101A EP04356101A EP1488770A1 EP 1488770 A1 EP1488770 A1 EP 1488770A1 EP 04356101 A EP04356101 A EP 04356101A EP 04356101 A EP04356101 A EP 04356101A EP 1488770 A1 EP1488770 A1 EP 1488770A1
Authority
EP
European Patent Office
Prior art keywords
quadrilateral
spacer
stand
backrest
upright
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04356101A
Other languages
German (de)
French (fr)
Other versions
EP1488770B1 (en
Inventor
François Xavier Laffin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lifestand "Vivre Debout"
Original Assignee
Lifestand International SA
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Filing date
Publication date
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Publication of EP1488770A1 publication Critical patent/EP1488770A1/en
Application granted granted Critical
Publication of EP1488770B1 publication Critical patent/EP1488770B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/14—Standing-up or sitting-down aids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/10—Occupant-arising assist

Definitions

  • the present invention relates to armchairs, more particularly but not exclusively, wheeled, which are used by the disabled and disabled and it equally applies to wheelchairs, folding or not.
  • Such a position is not capable of bringing a readjustment to life common and does not facilitate social contacts. Also, such a sitting position, maintained for relatively long periods, is responsible for a physical degradation, such as loss of angular range in the lower limbs, defective blood circulation, slowing digestive functions and intestinal, bone fragility, etc.
  • the chassis supports an articulated structure comprising a backrest, a seat and a footrest.
  • a structure is mounted articulated by the seat on a front axis horizontal, perpendicular to the vertical plane of symmetry of the chassis.
  • the structure articulated can be ordered with full motorization or assistance, to make shift the seat from a lowering position to a verticalization position and Conversely.
  • Such chairs are generally referred to as “chairs verticalizers or verticalizers ".
  • the armchairs of the above type have certainly resolved, for great part, the disadvantages arising from the use of a conventional armchair.
  • the articulated structure is composed of an element seat, a backrest and a footrest element which must therefore ability to occupy relatively a general position of the seat or seated type and be placed in line with each other in the vertical position or standing.
  • the structure articulated consists of two symmetrical articulated lateral systems comprising each a first deformable quadrilateral contributing to the support of the seat, composed of two bars, respectively upper and lower, articulated on the front part of a chassis and linked to their rear part by a part spacer.
  • Each lateral articulated system also includes a second deformable quadrilateral contributing to the support of the footrest, as well as a frame backrest which is articulated on the first quadrilateral, opposite the second quadrilateral, through at least the spacer and which includes at least one upright secured to the spacer.
  • the chair includes a set of maneuvers, interposed between the side assemblies and the chassis and assuming a control and control of the relative pivoting of the lateral assemblies from a lowering position to a vertical position of the structure relative to the chassis and vice versa.
  • this stand-up chair is characterized in that it further comprises means for automatically modifying the inclination of the backrest with respect to the vertical direction in the sagittal plane, between the positions lowering and verticalization.
  • the means for automatic modification of the inclination thus allow either a slight tilting of the backrest forwards when switching to vertical position, or, on the contrary, a slight tilting backwards during the transition from sitting to standing.
  • the automatic modification means can be performed in any suitable manner and, for example, include a system of connecting rods and appropriate references to ensure this change.
  • the means of automatic inclination modification include, for each system articulated side, the spacer and the first deformable quadrilateral which has a different shape from that of the parallelogram.
  • the modification means automatic backrest tilting are adjustable, so as to allow choice of direction and / or amplitude of the modification.
  • the means of modification are then, preferably but not necessarily, adjustable so as to present a neutral position in which the angle of the amounts, relative to the vertical in the sagittal plane, is identical in position lowered and in vertical position.
  • the. adjustable means for automatically changing the inclination of the backrest act on the shape of the first deformable quadrilateral.
  • the implementation for the modification automatic tilting of the backrest of the shape of the first quadrilateral deformable, provides a simple device with a reduced weight.
  • the adjustable means of automatic modification of the backrest inclination, for each articulated assembly the spacer on which the backrest is adapted so to form an identical angle with respect to the spacer, in the standing position and in a seated position, and means for modifying the shape of the first quadrilateral deformable.
  • the spacer includes at least two fixing positions for the articulation point corresponding to the lower bar of the first parallelogram.
  • the chair stander in order to allow better adaptation of the stand-up chair to the morphology of its user, also includes means for adjusting the angle of each amount in relation to the corresponding spacer.
  • Means for adjusting the relative angle of the upright and the spacer can be done in any suitable way.
  • the means for adjusting the angle of the amount in relation to the spacer include, for each amount, a pivot for fixing the upright on the articulation piece, allowing movement of rotation of the upright, between a folded position against the upper bar of the first quadrilateral or the seat of the chair and a raised position, as well as means of locking of the upright in the raised position which are integral with the part and movable on the latter, so as to allow modification continues from the angle between the spacer and the upright in the raised position and locked.
  • a stand-up chair according to the invention can comprise different types of propulsion, such as drive wheel systems electric or, preferably, manually propelled wheels.
  • Fig. 1 is a perspective of a wheelchair wheelchair according to the invention.
  • Fig. 2 is an elevation, in right view, of the chair illustrated in FIG. 1 , when sitting or lowering the chair.
  • Fig. 3 is a partial elevation, similar to FIG. 2, from the chair in the upright or standing position.
  • Fig. 4 is an elevation, similar to FIG. 2 without the drive wheel, illustrating in more detail a means of automatically modifying the inclination of the backrest.
  • Fig. 5 is a partial elevation, similar to FIG. 4, showing, on a larger scale, means for adjusting the angle of the backrest with respect to a part supporting it.
  • Fig. 6 is a view, similar to FIG. 4 , showing another embodiment of the adjustable means for automatic modification of the inclination of the backrest.
  • the invention aims to allow an automatic modification of the inclination of the backrest on a wheelchair, as illustrated in FIGS. 1 to 3, and designated as a whole by the reference 1 , in order to offer the best possible comfort to the user of the wheelchair.
  • Such an armchair 1 comprises a chassis 2 , composed of two lateral half-chassis 3 and 4 , joined together by crosspieces 5 and 6 . These various constituent elements define a load-bearing frame provided with drive wheels 10 and steerable steerable wheels 11.
  • the frame 2 corresponds to a chair of rigid design, but it is obvious that a substantially similar conformation could be retained for a folding chair. Indeed, in such a case, the rigid crosspieces 5 and 6 are then replaced by folding elements of a design known per se.
  • the chassis 2 is equipped with a stand-up device which is produced in the form of an articulated structure 12 carried by the chassis 2 .
  • the articulated structure 12 is constituted by two lateral articulated systems 13 , symmetrical with respect to a sagittal plane P and which are more particularly visible in FIGS. 2 and 3 .
  • Each articulated system 13 is intended to be adapted laterally on the chassis 2 , for example at each of the half-chassis 3 and 4 .
  • Each articulated system 13 comprises a first deformable quadrilateral 17 consisting of two bars 18 and 19, respectively called upper and lower, although they are not arranged, in the representation illustrated in FIG. 3, in the same vertical plane.
  • the bars 18 and 19 are joined, by their rear end part, by an element or a spacer 20, to which they are connected by pivots 20 1 , 20 2 .
  • the bars 18 and 19 are, moreover, mounted on the chassis 2, near the front part of the latter, by a first articulation point 21 concerning the upper bar 18 and by a second articulation point 22 concerning the lower bar 19 .
  • the articulation point 21 is provided in the upper part of the corresponding half-chassis 3 , 4 while the articulation point 22 is located on this same half-chassis behind and below the articulation point 21 .
  • the lower bars 19 and upper 16 and their respective points of articulation 20 1 , 21, 20 2 , 22 define the large upper sides G S and lower G I
  • the spacer 20 defines a small rear side P P of the first quadrilateral and the points of articulation 21, 22 on the front part of the frame defining a small anterior side P A , as can be seen in FIG. 4.
  • Each articulated system 13 further comprises a second polygon and, according to the example illustrated, a second deformable quadrilateral 26 , shown diagrammatically in FIGS. 2 and 3 in broken lines, connecting the first deformable quadrilateral to a jamb or upright 2 7 intended to support, alone or in combination with the leg or amount counterpart, a footrest 33.
  • Each articulated system 13 finally comprises a back frame comprising two uprights 35 , each articulated on the first quadrilateral 13 , opposite the second quadrilateral 26 , by means of the spacer 20 .
  • the backrest uprights 35 are, moreover, connected by a cross-member 36 .
  • each articulated system further comprises an operating assembly 40, interposed between the first quadrilateral 17 and the chassis 2 and, more particularly, the corresponding half-chassis 4 .
  • Each operating assembly 40 comprises a first lever 41, articulated on the rear part of the chassis, by means of a pivot 42 and, at the end of a second lever 43, by means of a pivot 44 .
  • the other end of the second lever 43 is then articulated on the first quadrilateral and, in the example shown, the bottom bar 19 via a pivot 45 and a fixing part 46 integral with the second lever 43 .
  • Each maneuvering assembly also includes a maneuvering handle 49 which could be qualified as multiple sockets, insofar as it must allow the user of the wheelchair to apply a force to this handle, both in the context of the lowering or sitting position illustrated in fig. 2 , that in the block of the verticalization position B illustrated in FIG. 3 and during the transition phase or verticalization-lowering movement.
  • a maneuvering handle 49 which could be qualified as multiple sockets, insofar as it must allow the user of the wheelchair to apply a force to this handle, both in the context of the lowering or sitting position illustrated in fig. 2 , that in the block of the verticalization position B illustrated in FIG. 3 and during the transition phase or verticalization-lowering movement.
  • the verticalizing chair described above also includes assistance means 50 .
  • these assistance means are constituted, for each of the articulated systems, by a gas spring 6 , interposed between the first quadrilateral 13 and the front part of the chassis 2 .
  • each gas spring 50 also incorporates automatic locking means which prevent any movement of the spring and therefore of the articulated system which is linked to it, as long as an unlocking command is not applied to the system. spring lock.
  • the handle 49 disposed on the side of the dominant hand of the user, then comprises a control member acting on the means for blocking the gas springs 50 .
  • the user of the wheelchair therefore has the possibility of changing, alternately, from a seated position to a standing position, according to his needs.
  • the invention proposes to implement means 60 making it possible to automatically modify the inclination ⁇ of the backrest relative to the vertical.
  • it will for example be possible to adopt a position slightly inclined towards the front or the rear of the backrest, in the lowering position, while the backrest will automatically adopt a position, for example but not exclusively, substantially vertical in the verticalization or standing position of the structure, in order to give a satisfactory orientation to the bust of the user in the standing position.
  • This automatic modification of the orientation of the file can be ensured by different ways.
  • the means 60 for automatically modifying the inclination of the backrest comprise, for each lateral articulated system, the spacer 20 on which the corresponding backrest amount 35 is adapted so as to form, with said piece spacing, an angle ⁇ which remains constant during the displacements of the articulated structure.
  • the automatic modification means 60 further comprise the first deformable quadrilateral 17, composed of the two long sides G S , G I and the short sides P B , P A.
  • the Applicant has had the merit of highlighting that a slight modification of the deformable quadrilateral 17 relative to the perfect parallelogram, allowed to obtain a variation of the inclination ⁇ between the lowering or sitting positions and the verticalization or standing position of the articulated structure.
  • the plaintiff advocates adopting a form different from that of parallelogram for the first quadrilateral, in order to obtain such a modification automatic.
  • the shape chosen for the first deformable quadrilateral is adopted so that the long sides G S and G I have lengths L S and L I equal, while the length L A of the short anterior side P A is chosen so as to be greater than the length L P of the short posterior side P P.
  • This conformation of the first deformable quadrilateral then makes it possible to obtain a rearward displacement of the backrest when passing from the sitting position to the standing position.
  • the backrest when the short posterior side P P has a length greater than that of the short anterior side P A , the backrest will tend to tilt forward when passing from the lowering position to the verticalization position. On the contrary, when the short side P P has a length shorter than that of the short anterior side P A , the backrest will tend to tilt backwards when passing from the lowering position to the verticalization position.
  • the latter comprises, preferably but not strictly necessary, means 70 for adjusting the angle ⁇ between each backrest upright 35 and the part d 'corresponding distance 20 .
  • the adjustment means 70 can be made in any suitable way. According to the embodiment of the chair, illustrated and described above and as shown in more detail in FIG. 5, the adjustment means comprise, for each lateral articulated system, a pivot 71 for fixing the backrest upright 35 on the spacer, so that the upright 35 has, opposite its part 72 for supporting the folder, a locking segment 73 .
  • the backrest upright 35 is then movable, between a folded position against the upper bar of the first deformable quadrilateral or the seat of the stand-up chair and a raised position for using the chair. stander 1 .
  • the inclination adjustment means 70 then further comprise means for locking the upright 35 and, more particularly, of its segment 73 in the raised position, so that the upright 35 is immobilized relative to the part d '' spacing 20 .
  • the locking means comprise a finger 74 integral with the locking segment 73 and a kind of striker 75, integral with the spacer 20, being movable relative thereto, so as to allow, by its movement, a change , preferably continuous, of the angle ⁇ .
  • the keeper can, for example, be mounted in a groove by being moved in translation by means of an Archimedes screw.
  • means 70 for adjusting the static inclination ⁇ of the upright 35 relative to the spacer 20 and means for automatic modification 60 of the inclination of the backrest, between the lowering position and the position of verticalization then makes it possible to offer optimal comfort to the user of the armchair, by allowing fine adjustments of the inclination of the backrest and, in particular, by making it possible to search for an inclination for the backrest, both optimal in the sitting position and in standing position.
  • the adjustable means for automatic modification 60 of the inclination ⁇ of the backrest, between the sitting and standing positions are produced by acting on the length L P of the small posterior side P P of the first deformable quadrilateral .
  • the adjustable automatic modification means 60 can be produced by acting on another side of the deformable quadrilateral.
  • fig. 6 illustrates another embodiment according to which the means of modification 60 of the shape of the first adjustable quadrilateral are constituted by means of continuous modification of the length of the upper bar 18 of the first deformable quadrilateral.
  • These continuous modification means 60 are, according to the illustrated example, constituted by a ring 90 connecting two segments 91 , 92 constituting the bar 18 and linked, to each of these segments, by a thread, so that a rotation of the. ring, in one direction, allows an increase in the length L S of the upper segment 18 and, in the opposite direction, a reduction in the length L S of the upper segment 18.

Abstract

The wheelchair consists of a frame supporting an articulated structure comprising a seat base, a foot rest, a back and two symmetrical articulated systems at the sides, each made up of a deformable quadrilateral (17) with upper and lower bars, a deformable polygon and a spacer (20). It also includes an automatic mechanism (60) that modifies the angle of the seat back relative to the vertical in the saggital plane as it moves between seated and upright positions. The mechanism includes the spacer and deformable quadrilaterial, which has a shape other than a parallelogram, and it is adjustable to allow a selection of the direction of modification and/or the amplitude of modification.

Description

La présente invention concerne les fauteuils, plus particulièrement mais non exclusivement, roulants, qui sont utilisés par les handicapés et les invalides et elle vise, indifféremment, les fauteuils roulants, pliants ou non.The present invention relates to armchairs, more particularly but not exclusively, wheeled, which are used by the disabled and disabled and it equally applies to wheelchairs, folding or not.

Il est incontestable que les fauteuils roulants ont apporté une possibilité de mobilité aux handicapés et aux invalides. Ces fauteuils roulants possèdent, toutefois, plusieurs inconvénients tenant au fait que les utilisateurs ne peuvent occuper qu'une position assise, par ailleurs maintenue en général pendant des durées relativement longues.There is no question that wheelchairs have provided an opportunity to mobility for the disabled and disabled. These wheelchairs have, however, several drawbacks due to the fact that users can only occupy one sitting position, generally maintained for relatively long periods long.

Une telle position n'est pas à même d'apporter une réadaptation à la vie courante et ne facilite pas les contacts sociaux. En outre, une telle position assise, maintenue pendant des durées relativement longues, est responsable d'une dégradation physique, telle que perte d'amplitude angulaire des membres inférieurs, circulation sanguine défectueuse, ralentissement des fonctions digestives et intestinales, fragilité osseuse, etc.Such a position is not capable of bringing a readjustment to life common and does not facilitate social contacts. Also, such a sitting position, maintained for relatively long periods, is responsible for a physical degradation, such as loss of angular range in the lower limbs, defective blood circulation, slowing digestive functions and intestinal, bone fragility, etc.

Pour remédier aux inconvénients ci-dessus, il a été proposé des fauteuils dont le châssis supporte une structure articulée comprenant un dossier, une assise et un repose-pieds. Une telle structure est montée articulée par l'assise sur un axe frontal horizontal, perpendiculaire au plan de symétrie vertical du châssis. La structure articulée peut être commandée avec motorisation complète ou assistance, pour faire passer l'assise d'une position d'abaissement à une position de verticalisation et inversement. De tels fauteuils sont, généralement, qualifiés de « fauteuils verticalisateurs ou verticalisateurs ».To overcome the above drawbacks, armchairs have been proposed, the chassis supports an articulated structure comprising a backrest, a seat and a footrest. Such a structure is mounted articulated by the seat on a front axis horizontal, perpendicular to the vertical plane of symmetry of the chassis. The structure articulated can be ordered with full motorization or assistance, to make shift the seat from a lowering position to a verticalization position and Conversely. Such chairs are generally referred to as "chairs verticalizers or verticalizers ".

Que la source de puissance, commandant ou permettant de commander la verticalisation et l'abaissement de la structure articulée, soit à base d'énergie électrique, de vérins élastiques, notamment à gaz, ou purement manuelle, les fauteuils du type ci-dessus ont certainement permis de résoudre, pour une grande partie, les inconvénients découlant de l'utilisation d'un fauteuil classique.Whether the power source, commanding or allowing to command the verticalization and lowering of the articulated structure, ie energy-based electric, of elastic cylinders, in particular gas, or purely manual, the armchairs of the above type have certainly resolved, for great part, the disadvantages arising from the use of a conventional armchair.

C'est certainement la raison du succès de tels fauteuils depuis déjà un certain nombre d'années. A titre de référence, il est possible de citer le brevet FR 2 529 456 qui est justement relatif à une telle conception de fauteuil verticalisateur.This is certainly the reason for the success of such armchairs for some time number of years. For reference, it is possible to cite the patent FR 2 529 456 which is precisely related to such a design of a stand-up chair.

Bien que donnant satisfaction, de tels fauteuils ont, semble-t-il, fait naítre une objection de confort tenant, notamment, à la nature de la structure articulée permettant d'élever ou d'abaisser, dans une position de sécurité maximale, le sujet invalide ou handicapé.Although satisfactory, such armchairs have apparently given rise to a comfort objection related, in particular, to the nature of the articulated structure allowing to raise or lower, in a position of maximum safety, the subject disabled or disabled.

Il faut, en effet, tenir compte du caractère articulé de cette structure qui peut passer d'une position de siège traditionnel à une position de verticalisation ou de verticalisation dans laquelle les différents segments la constituant sont sensiblement alignés dans le prolongement les uns des autres, selon une direction pseudo-verticale.We must, in fact, take into account the articulated nature of this structure which can move from a traditional seat position to a vertical position or verticalization in which the different segments constituting it are substantially aligned in the extension of each other, in a pseudo-vertical direction.

Pour répondre à l'exigence anatomique dans les différentes positions susceptibles d'être occupées, la structure articulée est composée d'un élément d'assise, d'un élément de dossier et d'un élément repose-pied qui doivent donc pouvoir occuper relativement une position générale du type siège ou assise et être placés dans le prolongement les uns des autres dans la position de verticalisation ou debout.To meet the anatomical requirement in the different positions likely to be occupied, the articulated structure is composed of an element seat, a backrest and a footrest element which must therefore ability to occupy relatively a general position of the seat or seated type and be placed in line with each other in the vertical position or standing.

Afin de permettre ce mouvement de verticalisation-abaissement, la structure articulée est constituée par deux systèmes articulés symétriques latéraux comprenant chacun un premier quadrilatère déformable contribuant au support de l'assise, composé de deux barres, respectivement supérieure et inférieure, articulées sur la partie antérieure d'un châssis et liées vers leur partie arrière par une pièce d'écartement. Chaque système articulé latéral comprend, également, un second quadrilatère déformable contribuant au support du repose-pied, ainsi qu'une armature de dossier qui est articulée sur le premier quadrilatère, à l'opposé du second quadrilatère, par l'intermédiaire de la pièce d'écartement au moins et qui comprend au moins un montant solidaire de la pièce d'écartement.In order to allow this verticalization-lowering movement, the structure articulated consists of two symmetrical articulated lateral systems comprising each a first deformable quadrilateral contributing to the support of the seat, composed of two bars, respectively upper and lower, articulated on the front part of a chassis and linked to their rear part by a part spacer. Each lateral articulated system also includes a second deformable quadrilateral contributing to the support of the footrest, as well as a frame backrest which is articulated on the first quadrilateral, opposite the second quadrilateral, through at least the spacer and which includes at least one upright secured to the spacer.

Le fauteuil comprend, enfin, un ensemble de manoeuvre, interposé entre les ensembles latéraux et le châssis et assumant une fonction de commande et de contrôle du pivotement relatif des ensembles latéraux d'une position d'abaissement à une position de verticalisation de la structure par rapport au châssis et inversement.Finally, the chair includes a set of maneuvers, interposed between the side assemblies and the chassis and assuming a control and control of the relative pivoting of the lateral assemblies from a lowering position to a vertical position of the structure relative to the chassis and vice versa.

Jusqu'à présent, il a été considéré que, dans la majorité des cas, le confort de l'utilisateur pouvait être assuré en conférant au dossier une inclinaison par rapport à la verticale, identique en position d'abaissement ou assise et en position de verticalisation ou debout. Les systèmes latéraux articulés ont donc été conçus de manière à conserver l'inclinaison du dossier tout au long du déplacement. So far, it has been considered that, in the majority of cases, the comfort of the user could be assured by giving the backrest an inclination relative to vertical, identical in the lowered or seated position and in the standing or standing. The articulated lateral systems have therefore been designed so as to maintain the inclination of the backrest throughout the journey.

Cependant, il est apparu que, dans certains cas, selon la morphologie ou la pathologie de l'utilisateur, il était nécessaire de pouvoir adopter une inclinaison différente en position verticalisée et en position assise.However, it appeared that in some cases, depending on the morphology or the pathology of the user, it was necessary to be able to adopt an inclination different in vertical position and in sitting position.

A cet effet, il a été proposé des moyens de réglage à commande manuelle et, le plus souvent, à motorisation électrique permettant de modifier à volonté l'inclinaison du dossier.To this end, manual control means have been proposed and, the more often, with electric motorization allowing to modify at will the inclination folder.

Cependant, de tels moyens de réglage de l'inclinaison à commande manuelle sont d'un usage fastidieux, dans la mesure où, à chaque changement de position, l'utilisateur du fauteuil doit corriger l'inclinaison du dossier.However, such manual tilt adjustment means are tedious to use, insofar as, with each change of position, the user of the wheelchair must correct the inclination of the backrest.

Ainsi, il apparaít le besoin d'éviter, autant que faire se peut, les phases de réglages à répétition et fastidieuses.Thus, it appears the need to avoid, as much as possible, the phases of repetitive and tedious adjustments.

Afin de remplir cet objectif, l'invention concerne un fauteuil verticalisateur pour handicapés et invalides comprenant un châssis supportant une structure articulée comprenant une assise, un repose-pied, un dossier et deux systèmes articulés symétriques latéraux comprenant chacun :

  • un premier quadrilatère déformable contribuant au support de l'assise, composé de deux barres, respectivement supérieure et inférieure, définissant les grands côtés du quadrilatère, articulées sur la partie antérieure du châssis définissant un petit côté antérieur du quadrilatère et liées, vers leurs parties arrière, par une pièce d'écartement définissant un petit côté postérieur du parallélogramme,
  • un second polygone déformable, contribuant au support du repose-pied,
  • une armature de dossier qui est articulée sur le premier quadrilatère, à l'opposé du second polygone, par l'intermédiaire de la pièce d'écartement au moins et qui comprend au moins un montant solidaire de la pièce d'écartement,
  • et un ensemble de manoeuvre, interposé entre l'ensemble latéral et le châssis, assumant une fonction de commande et de contrôle du pivotement relatif des systèmes latéraux, d'une position d'abaissement ou assise à une position de verticalisation ou debout de la structure par rapport au châssis et inversement.
In order to fulfill this objective, the invention relates to a stand-up chair for the disabled and disabled comprising a frame supporting an articulated structure comprising a seat, a footrest, a backrest and two lateral symmetrical articulated systems each comprising:
  • a first deformable quadrilateral contributing to the support of the seat, composed of two bars, respectively upper and lower, defining the long sides of the quadrilateral, articulated on the front part of the frame defining a small front side of the quadrilateral and linked, towards their rear parts , by a spacer defining a small posterior side of the parallelogram,
  • a second deformable polygon, contributing to the support of the footrest,
  • a back frame which is articulated on the first quadrilateral, opposite the second polygon, by means of at least the spacer and which comprises at least one upright secured to the spacer,
  • and an operating assembly, interposed between the lateral assembly and the chassis, assuming a command and control function for the relative pivoting of the lateral systems, from a lowering or sitting position to a verticalization or standing position of the structure relative to the chassis and vice versa.

Selon l'invention, ce fauteuil verticalisateur est caractérisé en ce qu'il comprend, en outre, des moyens de modification automatique de l'inclinaison du dossier par rapport à la direction verticale dans le plan sagittal, entre les positions d'abaissement et de verticalisation. According to the invention, this stand-up chair is characterized in that it further comprises means for automatically modifying the inclination of the backrest with respect to the vertical direction in the sagittal plane, between the positions lowering and verticalization.

Selon l'invention, les moyens de modification automatique de l'inclinaison permettent ainsi, soit un léger basculement du dossier vers l'avant lors du passage en position de verticalisation, soit, au contraire, un léger basculement vers l'arrière lors du passage de la position assise à la position debout.According to the invention, the means for automatic modification of the inclination thus allow either a slight tilting of the backrest forwards when switching to vertical position, or, on the contrary, a slight tilting backwards during the transition from sitting to standing.

Selon l'invention, les moyens de modification automatique peuvent être réalisés de toute façon appropriée et, par exemple, comprendre un système de bielles et de renvois adaptés pour assurer cette modification.According to the invention, the automatic modification means can be performed in any suitable manner and, for example, include a system of connecting rods and appropriate references to ensure this change.

Selon une forme préférée de réalisation de l'invention, les moyens de modification automatique de l'inclinaison comprennent, pour chaque système articulé latéral, la pièce d'écartement et le premier quadrilatère déformable qui présente une forme différente de celle du parallélogramme.According to a preferred embodiment of the invention, the means of automatic inclination modification include, for each system articulated side, the spacer and the first deformable quadrilateral which has a different shape from that of the parallelogram.

Selon une autre caractéristique de l'invention, les moyens de modification automatique de l'inclinaison du dossier sont réglables, de manière à permettre un choix du sens et/ou de l'amplitude de la modification.According to another characteristic of the invention, the modification means automatic backrest tilting are adjustable, so as to allow choice of direction and / or amplitude of the modification.

Les moyens de modification sont alors, de préférence mais non nécessairement, réglables de manière à présenter une position neutre dans laquelle l'angle des montants, par rapport à la verticale dans le plan sagittal, est identique en position d'abaissement et en position de verticalisation.The means of modification are then, preferably but not necessarily, adjustable so as to present a neutral position in which the angle of the amounts, relative to the vertical in the sagittal plane, is identical in position lowered and in vertical position.

Selon une caractéristique préférée mais non strictement nécessaire de l'invention, les. moyens réglables de modification automatique de l'inclinaison du dossier agissent sur la forme du premier quadrilatère déformable.According to a preferred but not strictly necessary characteristic of the invention, the. adjustable means for automatically changing the inclination of the backrest act on the shape of the first deformable quadrilateral.

A cet égard, il doit être remarqué que la mise en oeuvre, pour la modification automatique de l'inclinaison du dossier de la forme du premier quadrilatère déformable, permet d'obtenir un dispositif simple, présentant un poids réduit.In this regard, it should be noted that the implementation, for the modification automatic tilting of the backrest of the shape of the first quadrilateral deformable, provides a simple device with a reduced weight.

Selon encore une autre caractéristique de l'invention, les moyens réglables de modification automatique de l'inclinaison du dossier comprennent, pour chaque ensemble articulé, la pièce d'écartement sur laquelle le dossier est adapté de manière à former un angle identique par rapport à la pièce d'écartement, en position debout et en position assise, et des moyens de modification de la forme du premier quadrilatère déformable.According to yet another characteristic of the invention, the adjustable means of automatic modification of the backrest inclination, for each articulated assembly, the spacer on which the backrest is adapted so to form an identical angle with respect to the spacer, in the standing position and in a seated position, and means for modifying the shape of the first quadrilateral deformable.

De manière préférée mais non strictement nécessaire, les moyens de modification automatique permettent alors de choisir la forme du premier quadrilatère parmi au moins les trois formes suivantes :

  • parallélogramme,
  • quadrilatère dont les grands côtés possèdent la même longueur, tandis que le petit côté antérieur possède une longueur supérieure à celle du petit côté postérieur,
  • quadrilatère dont les grands côtés possèdent la même longueur, tandis que le petit côté postérieur possède une longueur supérieure à celle du petit côté antérieur.
Preferably but not strictly necessary, the automatic modification means then make it possible to choose the shape of the first quadrilateral from at least the following three shapes:
  • parallelogram,
  • quadrilateral whose long sides have the same length, while the short anterior side has a length greater than that of the short posterior side,
  • quadrilateral whose long sides have the same length, while the short posterior side has a length greater than that of the short anterior side.

Selon une forme préférée de réalisation et afin de permettre une telle modification de la forme du premier quadrilatère déformable, la pièce d'écartement comprend au moins deux positions de fixation pour le point d'articulation correspondant de la barre inférieure du premier parallélogramme.According to a preferred embodiment and in order to allow such modification of the shape of the first deformable quadrilateral, the spacer includes at least two fixing positions for the articulation point corresponding to the lower bar of the first parallelogram.

De manière préférée, la pièce d'écartement comprend trois positions pour le point d'articulation de la barre inférieure, conférant ainsi au premier quadrilatère déformable, respectivement, la forme :

  • d'un parallélogramme,
  • d'un quadrilatère dont le petit côté antérieur possède une longueur supérieure à celle du petit côté postérieur,
  • d'un quadrilatère dont le petit côté postérieur possède une longueur supérieure à celle du petit côté antérieur.
Preferably, the spacer comprises three positions for the articulation point of the lower bar, thus giving the first deformable quadrilateral, respectively, the form:
  • a parallelogram,
  • a quadrilateral whose short anterior side has a length greater than that of the short posterior side,
  • a quadrilateral whose short posterior side has a length greater than that of the short anterior side.

Selon une autre caractéristique de l'invention, afin de permettre une meilleure adaptation du fauteuil verticalisateur à la morphologie de son utilisateur, le fauteuil verticalisateur comprend, également, des moyens de réglage de l'angle de chaque montant par rapport à la pièce d'écartement correspondante.According to another characteristic of the invention, in order to allow better adaptation of the stand-up chair to the morphology of its user, the chair stander also includes means for adjusting the angle of each amount in relation to the corresponding spacer.

Les moyens de réglage de l'angle relatif du montant et de la pièce d'écartement peuvent être réalisés de toute façon appropriée.Means for adjusting the relative angle of the upright and the spacer can be done in any suitable way.

Selon une caractéristique de l'invention, les moyens de réglage de l'angle du montant par rapport à la pièce d'écartement comprennent, pour chaque montant, un pivot de fixation du montant sur la pièce d'articulation, autorisant un mouvement de rotation du montant, entre une position rabattue contre la barre supérieure du premier quadrilatère ou l'assise du fauteuil et une position relevée, ainsi que des moyens de verrouillage du montant en position relevée qui sont solidaires de la pièce d'écartement et mobiles sur cette dernière, de manière à permettre une modification continue de l'angle entre la pièce d'écartement et le montant en position relevée et verrouillée.According to a characteristic of the invention, the means for adjusting the angle of the amount in relation to the spacer include, for each amount, a pivot for fixing the upright on the articulation piece, allowing movement of rotation of the upright, between a folded position against the upper bar of the first quadrilateral or the seat of the chair and a raised position, as well as means of locking of the upright in the raised position which are integral with the part and movable on the latter, so as to allow modification continues from the angle between the spacer and the upright in the raised position and locked.

Par ailleurs, un fauteuil verticalisateur selon l'invention peut comprendre différents types de moyens de propulsion, tels que des systèmes de roues motrices électriques ou, de préférence, des roues à propulsion manuelle.Furthermore, a stand-up chair according to the invention can comprise different types of propulsion, such as drive wheel systems electric or, preferably, manually propelled wheels.

Diverses autres caractéristiques de l'invention ressortent de la description ci-dessous, effectuée en référence aux dessins annexés qui illustrent différentes formes, non limitatives, de réalisation d'un fauteuil verticalisateur selon l'invention et possédant des moyens de modification automatique de l'inclinaison du dossier..Various other characteristics of the invention will emerge from the description below, made with reference to the accompanying drawings which illustrate different shapes, non-limiting, of making a stand-up chair according to the invention and having means for automatically modifying the inclination of the backrest.

La fig. 1 est une perspective d'un fauteuil verticalisateur roulant selon l'invention. Fig. 1 is a perspective of a wheelchair wheelchair according to the invention.

La fig. 2 est une élévation, en vue de droite, du fauteuil illustré à la fig. 1, en position assise ou d'abaissement du fauteuil. Fig. 2 is an elevation, in right view, of the chair illustrated in FIG. 1 , when sitting or lowering the chair.

La fig. 3 est une élévation partielle, analogue à la fig. 2, du fauteuil en position de verticalisation ou debout. Fig. 3 is a partial elevation, similar to FIG. 2, from the chair in the upright or standing position.

La fig. 4 est une élévation, analogue à la fig. 2 sans la roue motrice, illustrant plus en détail un moyen de modification automatique de l'inclinaison du dossier. Fig. 4 is an elevation, similar to FIG. 2 without the drive wheel, illustrating in more detail a means of automatically modifying the inclination of the backrest.

La fig. 5 est une élévation partielle, analogue à la fig. 4, montrant, à plus grande échelle, des moyens de réglage de l'angle du dossier par rapport à une pièce le supportant. Fig. 5 is a partial elevation, similar to FIG. 4, showing, on a larger scale, means for adjusting the angle of the backrest with respect to a part supporting it.

La fig. 6 est une vue, analogue à la fig. 4, montrant une autre forme de réalisation des moyens réglables de modification automatique de l'inclinaison du dossier. Fig. 6 is a view, similar to FIG. 4 , showing another embodiment of the adjustable means for automatic modification of the inclination of the backrest.

L'invention vise à permettre une modification automatique de l'inclinaison du dossier sur un fauteuil verticalisateur roulant, tel qu'illustré aux fig. 1 à 3, et désigné dans son ensemble par la référence 1, afin d'offrir le meilleur confort possible à l'utilisateur du fauteuil.The invention aims to allow an automatic modification of the inclination of the backrest on a wheelchair, as illustrated in FIGS. 1 to 3, and designated as a whole by the reference 1 , in order to offer the best possible comfort to the user of the wheelchair.

Un tel fauteuil 1 comprend un châssis 2, composé de deux demi-châssis latéraux 3 et 4, réunis entre eux par des traverses 5 et 6. Ces différents éléments constitutifs définissent une armature porteuse pourvue de roues motrices 10 et de roues directrices orientables 11. Such an armchair 1 comprises a chassis 2 , composed of two lateral half-chassis 3 and 4 , joined together by crosspieces 5 and 6 . These various constituent elements define a load-bearing frame provided with drive wheels 10 and steerable steerable wheels 11.

Tel qu'illustré, le châssis 2 correspond à un fauteuil de conception rigide, mais il est bien évident qu'une conformation sensiblement analogue pourrait être retenue pour un fauteuil repliable. En effet, dans un tel cas, les traverses rigides 5 et 6 sont alors remplacées par des éléments pliants de conception connue en soi.As illustrated, the frame 2 corresponds to a chair of rigid design, but it is obvious that a substantially similar conformation could be retained for a folding chair. Indeed, in such a case, the rigid crosspieces 5 and 6 are then replaced by folding elements of a design known per se.

Le châssis 2, décrit ci-dessus, est équipé d'un dispositif verticalisateur qui est réalisé sous la forme d'une structure articulée 12 portée par le châssis 2. La structure articulée 12 est constituée par deux systèmes articulés latéraux 13, symétriques par rapport à un plan sagittal P et qui sont plus particulièrement visibles aux fig. 2 et 3. Chaque système articulé 13 est destiné à être adapté latéralement sur le châssis 2, par exemple au niveau de chacun des demi-châssis 3 et 4.The chassis 2 , described above, is equipped with a stand-up device which is produced in the form of an articulated structure 12 carried by the chassis 2 . The articulated structure 12 is constituted by two lateral articulated systems 13 , symmetrical with respect to a sagittal plane P and which are more particularly visible in FIGS. 2 and 3 . Each articulated system 13 is intended to be adapted laterally on the chassis 2 , for example at each of the half-chassis 3 and 4 .

Chaque système articulé 13comprend un premier quadrilatère déformable 17 constitué de deux barres 18 et 19, respectivement dite supérieure et inférieure, bien qu'elles ne soient pas disposées, dans la représentation illustrée fig. 3, dans un même plan vertical. Les barres 18 et 19 sont réunies, par leur partie terminale postérieure, par un élément ou une pièce d'écartement 20, à laquelle elles sont reliées par des pivots 201, 202. Les barres 18 et 19 sont, en outre, montées sur le châssis 2, à proximité de la partie frontale de ce dernier, par un premier point d'articulation 21 concernant la barre supérieure 18 et par un second point d'articulation 22 concernant la barre inférieure 19. Dans le cas présent, le point d'articulation 21 est prévu en partie supérieure du demi-châssis correspondant 3, 4 alors que le point d'articulation 22 est situé sur ce même demi-châssis en arrière et dessous le point d'articulation 21.Each articulated system 13 comprises a first deformable quadrilateral 17 consisting of two bars 18 and 19, respectively called upper and lower, although they are not arranged, in the representation illustrated in FIG. 3, in the same vertical plane. The bars 18 and 19 are joined, by their rear end part, by an element or a spacer 20, to which they are connected by pivots 20 1 , 20 2 . The bars 18 and 19 are, moreover, mounted on the chassis 2, near the front part of the latter, by a first articulation point 21 concerning the upper bar 18 and by a second articulation point 22 concerning the lower bar 19 . In the present case, the articulation point 21 is provided in the upper part of the corresponding half-chassis 3 , 4 while the articulation point 22 is located on this same half-chassis behind and below the articulation point 21 .

Ainsi, les barres inférieures 19 et supérieures 16 et leurs points d'articulation respectifs 201, 21, 202, 22 définissent les grands côtés supérieurs GS et inférieurs GI, tandis que la pièce d'écartement 20 définit un petit côté postérieur PP du premier quadrilatère et les points d'articulation 21, 22 sur la partie antérieure du châssis définissant un petit côté antérieur PA, comme cela ressort de la fig. 4. Thus, the lower bars 19 and upper 16 and their respective points of articulation 20 1 , 21, 20 2 , 22 define the large upper sides G S and lower G I , while the spacer 20 defines a small rear side P P of the first quadrilateral and the points of articulation 21, 22 on the front part of the frame defining a small anterior side P A , as can be seen in FIG. 4.

Chaque système articulé 13 comprend, en outre, un second polygone et, selon l'exemple illustré, un second quadrilatère déformable 26, schématisé aux fig. 2 et 3 en traits mixtes, reliant le premier quadrilatère déformable à un jambage ou montant 27 destiné à supporter, seul ou en combinaison avec le jambage ou montant homologue, un repose-pied 33.Each articulated system 13 further comprises a second polygon and, according to the example illustrated, a second deformable quadrilateral 26 , shown diagrammatically in FIGS. 2 and 3 in broken lines, connecting the first deformable quadrilateral to a jamb or upright 2 7 intended to support, alone or in combination with the leg or amount counterpart, a footrest 33.

Chaque système articulé 13 comprend, enfin, une armature de dossier comprenant deux montants 35, chacun articulé sur le premier quadrilatère 13, à l'opposé du second quadrilatère 26, par l'intermédiaire de la pièce d'écartement 20. Selon l'exemple illustré, les montants de dossier 35 sont, par ailleurs, reliés par une traverse 36.Each articulated system 13 finally comprises a back frame comprising two uprights 35 , each articulated on the first quadrilateral 13 , opposite the second quadrilateral 26 , by means of the spacer 20 . According to the example illustrated, the backrest uprights 35 are, moreover, connected by a cross-member 36 .

Afin de permettre un passage de la structure articulée 12 de la position d'abaissement assise, telle qu'illustrée à la fig. 2, à la position de verticalisation ou debout, telle qu'illustrée à la fig. 3, chaque système articulé comprend, en outre, un ensemble de manoeuvre 40, interposé entre le premier quadrilatère 17 et le châssis 2 et, plus particulièrement, le demi-châssis 4 correspondant.In order to allow the articulated structure 12 to pass from the seated lowering position, as illustrated in FIG. 2 , in the verticalization or standing position, as illustrated in FIG. 3 , each articulated system further comprises an operating assembly 40, interposed between the first quadrilateral 17 and the chassis 2 and, more particularly, the corresponding half-chassis 4 .

Chaque ensemble de manoeuvre 40 comprend un premier levier 41, articulé sur la partie arrière du châssis, par l'intermédiaire d'un pivot 42 et, à l'extrémité d'un second levier 43, par l'intermédiaire d'un pivot 44. L'autre extrémité du second levier 43 est alors articulée sur le premier quadrilatère et, selon l'exemple illustré, sur la barre inférieure 19, par l'intermédiaire d'un pivot 45 et d'une pièce de fixation 46 solidaire du second levier 43.Each operating assembly 40 comprises a first lever 41, articulated on the rear part of the chassis, by means of a pivot 42 and, at the end of a second lever 43, by means of a pivot 44 . the other end of the second lever 43 is then articulated on the first quadrilateral and, in the example shown, the bottom bar 19 via a pivot 45 and a fixing part 46 integral with the second lever 43 .

Chaque ensemble de manoeuvre comprend, également, une poignée de manoeuvre 49 qui pourrait être qualifiée de multiprises, dans la mesure où elle doit permettre, à l'utilisateur du fauteuil, d'appliquer un effort sur cette poignée, tant dans le cadre de la position d'abaissement ou assise illustrée à la fig. 2, que dans le cade de la position de verticalisation B illustrée à la fig. 3 et pendant la phase de transition ou mouvement de verticalisation-abaissement.Each maneuvering assembly also includes a maneuvering handle 49 which could be qualified as multiple sockets, insofar as it must allow the user of the wheelchair to apply a force to this handle, both in the context of the lowering or sitting position illustrated in fig. 2 , that in the block of the verticalization position B illustrated in FIG. 3 and during the transition phase or verticalization-lowering movement.

Afin de faciliter le mouvement de verticalisation-abaissement, le fauteuil verticalisateur décrit précédemment comprend, également, des moyens d'assistance 50. Selon cet exemple, ces moyens d'assistance sont constitués, pour chacun des systèmes articulés, par un ressort à gaz 6, interposé entre le premier quadrilatère 13 et la partie avant du châssis 2.In order to facilitate the verticalization-lowering movement, the verticalizing chair described above also includes assistance means 50 . According to this example, these assistance means are constituted, for each of the articulated systems, by a gas spring 6 , interposed between the first quadrilateral 13 and the front part of the chassis 2 .

Selon l'exemple illustré, chaque ressort à gaz 50 intègre, également, des moyens de blocage automatique qui empêchent tout mouvement du ressort et donc du système articulé qui lui est lié, tant qu'une commande de déblocage n'est pas appliquée au système de blocage du ressort. La poignée 49, disposée du côté de la main dominante de l'utilisateur, comprend alors un organe de commande agissant sur les moyens de blocage des ressorts à gaz 50.According to the example illustrated, each gas spring 50 also incorporates automatic locking means which prevent any movement of the spring and therefore of the articulated system which is linked to it, as long as an unlocking command is not applied to the system. spring lock. The handle 49, disposed on the side of the dominant hand of the user, then comprises a control member acting on the means for blocking the gas springs 50 .

Par la mise en oeuvre des ensembles de manoeuvre et des ressorts à gaz 50, l'utilisateur du fauteuil a donc la possibilité de passer, alternativement, d'une position assise à une position debout, en fonction de ses besoins. By using the operating assemblies and the gas springs 50, the user of the wheelchair therefore has the possibility of changing, alternately, from a seated position to a standing position, according to his needs.

Afin de garantir un confort optimal à l'utilisateur, l'invention propose de mettre en oeuvre des moyens 60 permettant de modifier automatiquement l'inclinaison β du dossier par rapport à la verticale. Ainsi, il sera par exemple possible d'adopter une position légèrement inclinée vers l'avant ou l'arrière du dossier, en position d'abaissement, tandis que le dossier adoptera, automatiquement, une position, par exemple mais non exclusivement, sensiblement verticale en position de verticalisation ou debout de la structure, afin de conférer une orientation satisfaisante au buste de l'utilisateur en position debout.In order to guarantee optimal comfort for the user, the invention proposes to implement means 60 making it possible to automatically modify the inclination β of the backrest relative to the vertical. Thus, it will for example be possible to adopt a position slightly inclined towards the front or the rear of the backrest, in the lowering position, while the backrest will automatically adopt a position, for example but not exclusively, substantially vertical in the verticalization or standing position of the structure, in order to give a satisfactory orientation to the bust of the user in the standing position.

Cette modification automatique de l'orientation du dossier peut être assurée de différentes manières.This automatic modification of the orientation of the file can be ensured by different ways.

Selon l'exemple illustré, les moyens 60 de modification automatique de l'inclinaison du dossier comprennent, pour chaque système articulé latéral, la pièce d'écartement 20 sur laquelle le montant de dossier 35 correspondant est adapté de manière à former, avec ladite pièce d'écartement, un angle α qui reste constant au cours des déplacements de la structure articulée. Les moyens de modification automatique 60 comprennent, en outre, le premier quadrilatère déformable 17, composé des deux grands côtés GS, GI et des petits côtés PB, PA . Afin de permettre une modification automatique de l'inclinaison β du dossier ou des montants 35 par rapport à la verticale V, la demanderesse a eu le mérite de mettre en évidence qu'une légère modification du quadrilatère déformable 17 par rapport au parallélogramme parfait, permettait d'obtenir une variation de l'inclinaison β entre les positions d'abaissement ou assise et la position de verticalisation ou debout de la structure articulée.According to the example illustrated, the means 60 for automatically modifying the inclination of the backrest comprise, for each lateral articulated system, the spacer 20 on which the corresponding backrest amount 35 is adapted so as to form, with said piece spacing, an angle α which remains constant during the displacements of the articulated structure. The automatic modification means 60 further comprise the first deformable quadrilateral 17, composed of the two long sides G S , G I and the short sides P B , P A. In order to allow an automatic modification of the inclination β of the backrest or of the uprights 35 relative to the vertical V, the Applicant has had the merit of highlighting that a slight modification of the deformable quadrilateral 17 relative to the perfect parallelogram, allowed to obtain a variation of the inclination β between the lowering or sitting positions and the verticalization or standing position of the articulated structure.

Ainsi, la demanderesse préconise d'adopter une forme différente de celle du parallélogramme pour le premier quadrilatère, afin d'obtenir une telle modification automatique.Thus, the plaintiff advocates adopting a form different from that of parallelogram for the first quadrilateral, in order to obtain such a modification automatic.

Selon l'exemple illustré, la forme choisie pour le premier quadrilatère déformable est adoptée de manière que les grands côtés GS et GI présentent des longueurs LS et LI égales, tandis que la longueur LA du petit côté antérieur PA est choisie de manière à être supérieure à la longueur LP du petit côté postérieur PP. Cette conformation du premier quadrilatère déformable permet alors d'obtenir un déplacement vers l'arrière du dossier lors du passage de la position assise à la position debout.According to the example illustrated, the shape chosen for the first deformable quadrilateral is adopted so that the long sides G S and G I have lengths L S and L I equal, while the length L A of the short anterior side P A is chosen so as to be greater than the length L P of the short posterior side P P. This conformation of the first deformable quadrilateral then makes it possible to obtain a rearward displacement of the backrest when passing from the sitting position to the standing position.

Selon l'exemple illustré, les moyens 60 de modification automatique sont réglables et il est possible de choisir trois longueurs différentes pour le petit côté postérieur PP du quadrilatère. A cet effet, la pièce d'écartement présente trois alésages 61 qui sont disposés en triangle et qui permettent de choisir la forme du premier quadrilatère déformable parmi les trois formes suivantes :

  • parallélogramme,
  • côté postérieur PP ayant une longueur LP supérieure à celle LA du petit côté antérieur PA ,
  • petit côté postérieur PP ayant une longueur LP inférieure à celle LA du petit côté antérieur PA .
According to the example illustrated, the means 60 for automatic modification are adjustable and it is possible to choose three different lengths for the small posterior side P P of the quadrilateral. For this purpose, the spacer has three bores 61 which are arranged in a triangle and which make it possible to choose the shape of the first deformable quadrilateral from the following three shapes:
  • parallelogram,
  • posterior side P P having a length L P greater than that L A of the short anterior side P A ,
  • short posterior side P P having a length L P shorter than that L A of the short anterior side P A.

Le choix de la forme parallélogramme correspond, alors, à un réglage neutre pour lequel l'amplitude de modification de l'inclinaison du dossier entre les positions d'abaissement et de verticalisation est nulle; ce dernier conservant la même inclinaison β.The choice of the parallelogram shape corresponds, then, to a neutral setting for which the amplitude of modification of the inclination of the backrest between the lowering and verticalization positions is zero; the latter retaining the same inclination β .

En revanche, lorsque le petit côté postérieur PP présente une longueur supérieure à celle du petit côté antérieur PA , le dossier tendra à s'incliner vers l'avant lors du passage de la position d'abaissement à la position de verticalisation. Au contraire, lorsque le petit côté PP présente une longueur inférieure à celle du petit côté antérieur PA , le dossier tendra à s'incliner vers l'arrière lors du passage de la position d'abaissement à la position de verticalisation.On the other hand, when the short posterior side P P has a length greater than that of the short anterior side P A , the backrest will tend to tilt forward when passing from the lowering position to the verticalization position. On the contrary, when the short side P P has a length shorter than that of the short anterior side P A , the backrest will tend to tilt backwards when passing from the lowering position to the verticalization position.

Toujours dans le sens d'un meilleur confort pour l'utilisateur du fauteuil verticalisateur 1, ce dernier comprend, de manière préférée mais non strictement nécessaire, des moyens de réglage 70 de l'angle α entre chaque montant de dossier 35 et la pièce d'écartement 20 correspondante.Still in the direction of better comfort for the user of the stand-up chair 1 , the latter comprises, preferably but not strictly necessary, means 70 for adjusting the angle α between each backrest upright 35 and the part d 'corresponding distance 20 .

Les moyens de réglage 70 peuvent être réalisés de toute façon appropriée. Selon la forme de réalisation du fauteuil, illustrée et décrite précédemment et comme cela ressort plus en détail de la fig. 5, les moyens de réglage comprennent, pour chaque système articulé latéral, un pivot 71 de fixation du montant de dossier 35 sur la pièce d'écartement, de manière que le montant 35 présente, à l'opposé de sa partie 72 de support du dossier, un segment 73 de verrouillage. The adjustment means 70 can be made in any suitable way. According to the embodiment of the chair, illustrated and described above and as shown in more detail in FIG. 5, the adjustment means comprise, for each lateral articulated system, a pivot 71 for fixing the backrest upright 35 on the spacer, so that the upright 35 has, opposite its part 72 for supporting the folder, a locking segment 73 .

Compte tenu de sa fixation par l'intermédiaire du pivot 71, le montant de dossier 35 est alors mobile, entre une position rabattue contre la barre supérieure du premier quadrilatère déformable ou l'assise du fauteuil verticalisateur et une position relevée d'utilisation du fauteuil verticalisateur 1.Given its fixing by means of pivot 71, the backrest upright 35 is then movable, between a folded position against the upper bar of the first deformable quadrilateral or the seat of the stand-up chair and a raised position for using the chair. stander 1 .

Les moyens de réglage de l'inclinaison 70 comprennent alors, en outre, des moyens de verrouillage du montant 35 et, plus particulièrement, de son segment 73 en position relevée, de manière que le montant 35 se trouve immobilisé par rapport à la pièce d'écartement 20. Les moyens de verrouillage comprennent un doigt solidaire 74 du segment de verrouillage 73 et une sorte de gâche 75, solidaire de la pièce d'écartement 20, en étant mobile par rapport à cette dernière, de manière à permettre, par son déplacement, une modification, de préférence continue, de l'angle α. A cet effet, la gâche peut, par exemple, être montée dans une rainure en étant déplacée en translation au moyen d'une vis d'Archimède.The inclination adjustment means 70 then further comprise means for locking the upright 35 and, more particularly, of its segment 73 in the raised position, so that the upright 35 is immobilized relative to the part d '' spacing 20 . The locking means comprise a finger 74 integral with the locking segment 73 and a kind of striker 75, integral with the spacer 20, being movable relative thereto, so as to allow, by its movement, a change , preferably continuous, of the angle α. For this purpose, the keeper can, for example, be mounted in a groove by being moved in translation by means of an Archimedes screw.

L'association des moyens 70 de réglage de l'inclinaison statique α du montant 35 par rapport à la pièce d'écartement 20 et des moyens de modification automatique 60 de l'inclinaison du dossier, entre la position d'abaissement et la position de verticalisation, permet alors d'offrir un confort optimal à l'utilisateur du fauteuil, en autorisant des réglages fins d'inclinaison du dossier et, notamment, en permettant de recherche une inclinaison pour le dossier, à la fois optimale en position assise et en position debout.The combination of means 70 for adjusting the static inclination α of the upright 35 relative to the spacer 20 and means for automatic modification 60 of the inclination of the backrest, between the lowering position and the position of verticalization, then makes it possible to offer optimal comfort to the user of the armchair, by allowing fine adjustments of the inclination of the backrest and, in particular, by making it possible to search for an inclination for the backrest, both optimal in the sitting position and in standing position.

Selon l'exemple de réalisation décrit précédemment, les moyens réglables de modification automatique 60 de l'inclinaison β du dossier, entre les positions assise et debout, sont réalisés en agissant sur la longueur LP du petit côté postérieur PP du premier quadrilatère déformable.According to the embodiment described above, the adjustable means for automatic modification 60 of the inclination β of the backrest, between the sitting and standing positions, are produced by acting on the length L P of the small posterior side P P of the first deformable quadrilateral .

Toutefois, les moyens réglables de modification automatique 60 peuvent être réalisés en agissant sur un autre côté du quadrilatère déformable.However, the adjustable automatic modification means 60 can be produced by acting on another side of the deformable quadrilateral.

Ainsi, la fig. 6 illustre une autre forme de réalisation selon laquelle les moyens de modification 60 de la forme du premier quadrilatère réglable sont constitués par des moyens de modification continue de la longueur de la barre supérieure 18 du premier quadrilatère déformable. Ces moyens de modification continue 60 sont, selon l'exemple illustré, constitués par une bague 90 reliant deux segments 91, 92 constitutifs de la barre 18 et liés, à chacun de ces segments, par un filetage, de sorte qu'une rotation de la. bague, dans un sens, permet une augmentation de la longueur LS du segment supérieur 18 et, dans le sens inverse, une réduction de la longueur LS du segment supérieur 18. Thus, fig. 6 illustrates another embodiment according to which the means of modification 60 of the shape of the first adjustable quadrilateral are constituted by means of continuous modification of the length of the upper bar 18 of the first deformable quadrilateral. These continuous modification means 60 are, according to the illustrated example, constituted by a ring 90 connecting two segments 91 , 92 constituting the bar 18 and linked, to each of these segments, by a thread, so that a rotation of the. ring, in one direction, allows an increase in the length L S of the upper segment 18 and, in the opposite direction, a reduction in the length L S of the upper segment 18.

Ainsi, en fonction de la longueur retenue, il est possible, au moyen, de la bague 90, d'agir tant sur le sens de la modification de l'inclinaison β du dossier que sur la valeur ou l'amplitude de cette modification.Thus, depending on the length chosen, it is possible, by means of the ring 90, to act both on the direction of the modification of the inclination β of the backrest and on the value or the amplitude of this modification.

Bien entendu, diverses autres modifications peuvent être apportées à l'invention sans sortir de son cadre.Of course, various other modifications can be made to the invention without departing from its scope.

Claims (11)

Fauteuil verticalisateur pour handicapés et invalides, comprenant un châssis (2) supportant une structure articulée (12) comprenant une assise, un repose-pied, un dossier et deux systèmes articulés symétriques latéraux (13) comprenant chacun : un premier quadrilatère déformable (17) contribuant au support de l'assise, composé de deux barres, respectivement supérieure (18) et inférieure (19), définissant les grands côtés (GS, GI) du quadrilatère, articulées sur la partie antérieure du châssis (2) correspondant du petit côté antérieur (Pa) du quadrilatère et liées vers leurs parties arrière par une pièce d'écartement (20), correspondant à un petit côté postérieur (PP), un second polygone (26) déformable, contribuant au support du repose-pied, une armature de dossier qui est articulée sur le premier quadrilatère (17), à l'opposé du second polygone (27), par l'intermédiaire de la pièce d'écartement (20) au moins et qui comprend au moins un montant solidaire (35) de la pièce d'écartement (20), et un ensemble de manoeuvre, interposé entre l'ensemble latéral et le châssis, assumant une fonction de commande et de contrôle du pivotement relatif des systèmes latéraux, d'une position d'abaissement à une position de verticalisation de la structure par rapport au châssis et inversement,    caractérisé en ce qu'il comprend, en outre, des moyens (60) de modification automatique de l'inclinaison (β) du dossier par rapport à la direction verticale dans le plan sagittal, entre les positions d'abaissement et de verticalisation (3).Standing chair for the disabled and disabled, comprising a frame (2) supporting an articulated structure (12) comprising a seat, a footrest, a backrest and two lateral symmetrical articulated systems (13) each comprising: a first deformable quadrilateral (17) contributing to the support of the seat, composed of two bars, respectively upper (18) and lower (19) , defining the long sides (G S , G I ) of the quadrilateral, articulated on the front part of the frame (2) corresponding to the small anterior side (P a ) of the quadrilateral and linked towards their rear parts by a spacer (20), corresponding to a small rear side (P P ) , a second deformable polygon (26) , contributing to the support of the footrest, a back frame which is articulated on the first quadrilateral (17), opposite the second polygon (27), by means of the spacer (20) at least and which comprises at least one fixed amount ( 35) of the spacer (20), and an operating assembly, interposed between the lateral assembly and the chassis, assuming a command and control function for the relative pivoting of the lateral systems, from a lowering position to a position for verticalizing the structure relative to the chassis and vice versa, characterized in that it further comprises means (60) for automatically modifying the inclination (β) of the backrest with respect to the vertical direction in the sagittal plane, between the lowering and verticalization positions (3 ) . Fauteuil verticalisateur selon la revendication 1, caractérisé en ce que les moyens de modification automatique de l'inclinaison comprennent, pour chaque système articulé latéral, la pièce d'écartement (20) et le premier quadrilatère (17) qui présente une forme différente de celle d'un parallélogramme.Stand-up chair according to claim 1, characterized in that the means for automatically changing the inclination comprise, for each lateral articulated system, the spacer (20) and the first quadrilateral (17) which has a shape different from that a parallelogram. Fauteuil verticalisateur selon la revendication 1, caractérisé en ce que les moyens de modification automatique (60) sont réglables de manière à permettre un choix du sens de la modification et/ou de l'amplitude de la modification.Stand-up chair according to claim 1, characterized in that the automatic modification means (60) are adjustable so as to allow a choice of the direction of the modification and / or the amplitude of the modification. Fauteuil verticalisateur selon la revendication 3, caractérisé en ce que les moyens de modification automatique (60) sont réglables de manière à présenter une position neutre dans laquelle l'angle (β) des montants (35) par rapport à la verticale, dans le plan sagittal, est identique en position d'abaissement et en position de verticalisation.Stand-up chair according to claim 3, characterized in that the automatic modification means (60) are adjustable so as to have a neutral position in which the angle (β) of the uprights (35) relative to the vertical, in the plane sagittal, is identical in the lowering position and in the verticalization position. Fauteuil verticalisateur selon la revendication 3 ou 4, caractérisé en ce que les moyens réglables (60) de modification automatique de l'inclinaison (β) du dossier comprennent la pièce d'écartement (20) sur laquelle le montant (35) du dossier est adapté, de manière à former un angle identique par rapport à la pièce d'écartement, en position de verticalisation et en position d'abaissement, et des moyens de modification (61, 90) de la forme du premier quadrilatère déformable (17). Stand-up chair according to claim 3 or 4, characterized in that the adjustable means (60) for automatic modification of the inclination (β) of the backrest comprise the spacer (20) on which the upright (35) of the backrest is adapted, so as to form an identical angle with respect to the spacer, in the verticalization position and in the lowering position, and means for modifying (61, 90) the shape of the first deformable quadrilateral (17). Fauteuil verticalisateur selon la revendication 5, caractérisé en ce que les moyens de modification automatique réglables (60) permettent de choisir la forme du premier quadrilatère (17) parmi au moins les trois formes suivantes : parallélogramme, quadrilatère dont les grands côtés (GS, GI) possèdent une même longueur (LS, LI), tandis que le petit côté antérieur (Pa) possède une longueur (La) supérieure à celle (LP) du petit côté postérieur (PP), quadrilatère dont les grands côtés possèdent une même longueur (LS, LI), tandis que le petit côté postérieur (PP) possède une longueur (LP) supérieure à celle (La) du petit côté antérieur (Pa). Stand-up chair according to claim 5, characterized in that the adjustable automatic modification means (60) make it possible to choose the shape of the first quadrilateral (17) from at least the following three shapes: parallelogram, quadrilateral whose long sides (G S , G I ) have the same length (L S , L I ), while the short anterior side (P a ) has a length (L a ) greater than that (L P ) of the small posterior side (P P ), quadrilateral whose long sides have the same length (L S , L I ), while the short posterior side (P P ) has a length (L P ) greater than that (L a ) of the short anterior side (Pa). Fauteuil verticalisateur selon la revendication 5 ou 6, caractérisé en ce que la pièce d'écartement (20) comprend au moins deux positions de fixation pour le point d'articulation correspondant de la barre inférieure (19) du premier quadrilatère déformable (17).Stand-up chair according to claim 5 or 6, characterized in that the spacer (20) comprises at least two fixing positions for the corresponding articulation point of the lower bar (19) of the first deformable quadrilateral (17) . Fauteuil verticalisateur selon la revendication 7, caractérisé en ce que la pièce d'écartement comprend trois positions pour le point d'articulation de la barre inférieure (19) conférant au premier quadrilatère déformable (17), respectivement, la forme : d'un parallélogramme, d'un quadrilatère dont le petit côté antérieur possède une longueur supérieure à celle du petit côté postérieur, d'un quadrilatère dont le petit côté postérieur possède une longueur supérieure à celle du petit côté antérieur. Standing chair according to claim 7, characterized in that the spacer comprises three positions for the point of articulation of the lower bar (19) giving the first deformable quadrilateral (17), respectively, the shape: a parallelogram, a quadrilateral whose short anterior side has a length greater than that of the short posterior side, a quadrilateral whose short posterior side has a length greater than that of the short anterior side. Fauteuil verticalisateur selon la revendication 3, caractérisé en ce que les moyens réglables de modification automatique (60) agissent sur la forme du premier quadrilatère déformable.Stand-up chair according to claim 3, characterized in that the adjustable means for automatic modification (60) act on the shape of the first deformable quadrilateral. Fauteuil verticalisateur selon l'une des revendications 1 à 9, caractérisé en ce qu'il comprend des moyens (70) de réglage de l'angle (α) de chaque montant (35) par rapport à la pièce d'écartement (20) correspondante.Stand-up chair according to one of Claims 1 to 9, characterized in that it comprises means (70) for adjusting the angle (α) of each upright (35) relative to the spacer (20) corresponding. Fauteuil verticalisateur selon la revendication 10, caractérisé en ce que les moyens de réglage, entre le montant (35) et la pièce d'écartement (20), comprennent, pour chaque montant (35) : un pivot (71) de fixation du montant (35) sur la pièce d'écartement (20) autorisant un mouvement de rotation du montant (35), entre une position rabattue contre la barre supérieure (18) du premier quadrilatère (17) et une position relevée, et des moyens de verrouillage (74) du montant (35) en position relevée qui sont solidaires de la pièce d'écartement (20) et mobiles sur cette dernière, de manière à permettre une modification continue de l'angle (α), entre le montant (35) et la pièce d'écartement (20). Stand-up chair according to claim 10, characterized in that the adjustment means, between the upright (35) and the spacer (20), comprise, for each upright (35): a pivot (71) for fixing the upright (35) on the spacer (20) allowing a rotational movement of the upright (35), between a folded position against the upper bar (18) of the first quadrilateral (17) and a raised position, and locking means (74) of the upright (35) in the raised position which are integral with the spacer (20) and movable on the latter, so as to allow a continuous modification of the angle (α), between the upright (35) and the spacer (20).
EP04356101A 2003-06-19 2004-06-17 Stand-up chair with self-modifying tilting of the backrest Not-in-force EP1488770B1 (en)

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FR0307412A FR2856282B1 (en) 2003-06-19 2003-06-19 VERTICALIZING SEAT WITH AUTOMATIC CHANGE OF RECLINER INCLINATION
FR0307412 2003-06-19

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FR2856282A1 (en) 2004-12-24
US7234776B2 (en) 2007-06-26
FR2856282B1 (en) 2006-02-17
US20050040688A1 (en) 2005-02-24
ATE521320T1 (en) 2011-09-15
EP1488770B1 (en) 2011-08-24

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